Stretch it and Boost it. That could be the mantra of 2017 as many companies continue to update existing models. Those updates often include the switch to Boost 148mm rear spacing as well as “modern” geometry which typically features longer reach and front center measurements to compliment shorter stems and wider bars.
But as Canfield Brothers shows, those updates aren’t just for full suspension bikes. To create the fourth generation of their steel 29er, the Nimble 9 morphs into a more capable machine, and even adds a bit of plus compatibility…
Billed as a 29″ all mountain hard tail, the 4130 chromoly frame couples a 66.5 degree HTA with super short 16.25″ (412.75mm) chainstays in the shortest position (16.9″ in longest position). The sliding 148 x 12 dropouts include an axle and allow the frame to run both geared and single speed drivetrains. Along with a longer reach, the frame gains a shorter seat tube for better dropper seat post clearance for shorter riders or the ability to run longer droppers for taller riders.
Plus compatibility doesn’t seem to be the focus, but Canfield Bros. point out that the frame can run up to a 27.5 x 2.8″ tire on a 35mm internally wide rim. Otherwise, a 29 x 2.5″ tire should fit.
Up front, the 44mm headtube will accept tapered steerers and is meant for 120-140mm travel forks. Frames are kept simple with external cable routing and threaded 73mm bottom bracket shells, front derailleur compatibility, and IS brake mounts.
Nimble 9 Boost frames will be available in 4 sizes and 4 colors starting at $749 for the frame only. From there, any combination of parts can be purchased from Canfield Bros. to create a partial or a full build. Available now.
● 29″ All Mountain
● 4130 chromoly steel
● Increased reach and shorter seat tube
● 66.5° head angle (w/ 140mm fork)
● Custom sliding Boost 148mm x 12mm rear dropouts, axle included
● Adjustable 16.25“ – 16.9” chainstays
● Stealth cable routing
● Sparkle metallic painted finish
● ED Black treated for superior anti-corrosion resistance
● Removable direct mount front derailleur block
● Two water bottle bosses